Breaking change to /setworldspawn and /spawnpoint in minor datapack version

The changelog for 25w31a describes minor versions as the following:

A minor version increment of the game's pack version is backwards-compatible, meaning all packs made for previous iterations of the same major version will keep working.

1.21.9-pre1 changed the /spawnpoint and /setworldspawn commands to add another “optional” parameter: pitch.

Unfortunately, this breaks all datapacks using spawnpoint and setworldspawn with the yaw argument. The following commands are valid in 1.21.8 and 25w37a, but not in 1.21.9-pre1:

/spawnpoint @s ~ ~ ~ 10 and /setworldspawn ~ ~ ~ 10

To me, this clearly is a breaking change, but 1.21.9-pre1 is a minor version bump (87.1 from 25w37a’s 87.0).